Counting number of weekdays between column with start date and column with end date

[JK87]

Dear all,
I would like to requst your assistance on how to add a new column that counts the number of mondays (or any other day) between a date column with a starting date and a date column with an end date? 

Both DATE_START and DATE_END should be included in the calculation, but if DATE_START and DATE_END are the same date value it should should only copunt as one "monday".

I have the result, I would like in excel. I would however much prefer to have it in my Power Bi-model...

I hope you can help!

All the best,

Jacob

[peter99_99_99]

Please help me bellow 

thanks ahead

Original data
Work Date   ID       Qty amount
2023-02-28 FS-002 1 15
2023-02-28 FS-002 2 22
2023-02-28 FS-003 3 31
2023-02-28 FS-003 1 34
2023-02-28 FS-003 2 15
2023-02-28 FS-004 3 15
2023-02-28 FS-005 1 15
2023-02-28 FS-005 2 15
2023-02-28 FS-005 3 15
2023-02-28 FS-005 1 15
2023-02-28 FS-005 2 15
2023-02-28 FS-005 3 15
2023-02-28 FS-005 1 15
2023-03-01 FS-003 2 15
2023-03-01 FS-002 3 15
2023-03-01 FS-002 1 15
2023-03-01 FS-002 2 15
2023-03-01 FS-002 3 15
2023-03-01 FS-002 1 15

Expecting Result
Work Date   ID    Count Qty sum amount
2023-02-28 4 13 237
2023-03-01 2 6 90

[JK87]

Hi @Greg_Deckler ,
It works a treat! 
Thanks!

[Greg_Deckler · Accepted solution]

@JK87 You can do something like this:

Measure = 
  VAR __Table = 
    ADDCOLUMNS(
      CALENDAR( [DATE_START], [DATE_END] ),
      "__WeekDay", WEEKDAY( [Date], 2 )
    )
  VAR __Result = COUNTROWS( FILTER( __Table, [__WeekDay] = 1) ) // this is for Monday
RETURN
  __Result